ASTM DIN JIS Standard Cold Rolling/Cold Drawn Seamless Steel Pipe with Small Tolerance

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: IR-C
• Material: Carbon Steel, Alloy Steel, Stainless Steel
• Surface Treatment: Polished
• Usage: Pipeline Transport, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Outer Diameter: 18mm~416mm
• Wall Thickness: 0.8mm~20mm
• Length: 6meters, 9meters, 12meters, Random Length
• Surface: Annealed, Pickling, Straightening
• Tolerance of Size: +/- 0.05mm
• Transport Package: Bundled, Wrapped, Wooden Cased.
• Specification: GB/T8163, JIS, DIN
• Trademark: Iron&steel
• Origin: China
• HS Code: 73041990
• Production Capacity: 100 Tons Per Month

Product Description

Toleraance of size: ±0.05mm(outer diameter). 
OD: 21mm~416mm
Wall thickness: 0.8mm~20mm
Technique: Cold drawing
Standard: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel material: 20#(AISI 1020/DIN1.0402 C22), 45#(ASTM 1045, DIN45), 20Cr, Q345B, etc
We are professional manufacturer of cold drawn seamless steel pipe in China. Our seamless steel pipe with very high precision of size
Usage: Widely used for mechanical processing, Automobile industry, hydraulic equipments
Advantages of our high precision seamless steel pipe: 
1. Smaller caliber
2. Accept small qty order
3. Good surface treatment
4. The pipe with superior performance, suitable for mechanical making
Accurate size

Perfect surface treatment







Anti-corrosion Packing
Final Supply Conditions

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming(e. G. Bending expanding).
Cold finished and stress-relleved	BKS	Heat treatment is applled following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere

Preicision Seamless Tube Size List

OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)
Φ13.1	1.5-3	Φ35.5	1.5-7	Φ46.1	1.5-10	Φ93	1.5-15
Φ19.25	1.5-5	Φ35.9	1.5-7	Φ47.8	1.5-10	Φ19-Φ121	1.5-15
Φ22	1.5-5	Φ36.6	1.5-7	Φ49.2	1.5-10
Φ22.2	1.5-5	Φ38	1.5-8	Φ49.5	1.5-10
Φ25	1.5-6	Φ38.4	1.5-8	Φ52.3	1.5-10
Φ26.3	1.5-6	Φ40	1.5-10	Φ53.8	1.5-10
Φ27	1.5-6	Φ40.2	1.5-10	Φ57	1.5-10
Φ28	1.5-6	Φ40.9	1.5-10	Φ59	1.5-10
Φ30	1.5-6	Φ41.3	1.5-10	Φ60	1.5-11
Φ30.25	1.5-6	Φ41.6	1.5-10	Φ62.5	1.5-11
Φ30.9	1.5-6	Φ42	1.5-10	Φ74	1.5-11
Φ31	1.5-7	Φ43	1.5-10	Φ75	1.5-11
Φ32	1.5-7	Φ44.5	1.5-10	Φ76	1.5-11
Φ35	1.5-7	Φ45.8	1.5-10	Φ89	1.5-15

Chemical Composition of seamless steel pipe 

Material	Chemical composition (%)
	C	Mn	P	S	Si	Ni	Cu
20# AISI 1020	0.17~0.23	0.35~0.65	≤0.035	≤0.035	0.17~0.37	≤0.3	≤0.25
45# ASTM1045, DIN45	0.42~0.5	0.5~0.8	≤0.04	≤0.045	0.17~0.37	≤0.25	≤0.25

Mechanical Properties of seamless steel pipe 

Steel material	Tensile Strength MPa	Yield strength MPa	Elongation %	Hardness	Straightness
20#	≥510	≥245	≥25	≤156HB	0.3~1.0
45#	≥647	≥355	≥16	≤HRC62	0.3~1.